Furnace for treating hydrocarbons



C. C. STUTZ.

FURNACE FOR TREATING HYDROCARBONS.

APPLlCATlON FILED OCT.30, 1915. REHEWED MAR. 15,1919.

3 SHEETSwSHEET C. C. STUTZ.

FURNACE FOR TREATING HYDROCARBONS.

APPLICATION FILED 001.30, 1915. RENEwED 111111.15. 1919.

1,359,931. Patented Nov. 23,1920.

A 3 SHEETS-SHEET 2.

u- LLwvMCM-l l MQWWQM C. C. STUTZ.

FUHNACE FOR TREATING HYDROCARBONS. APPLICATION FILED ocT.30. 1.915.RENEwED MAR'. 15, 1919. 1,.." 9,9f31.v

Patented N 23, 1920.

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SM w M WITNESSES UNITED STATES PATENT OFFICE.

CHARLES C. STUTZ, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO SYNTHETICHYDROCARBON COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OFDELAWARE.

FURNACE -FOR TREATING HYDROCARBONS.

Application filed October 30, 1915, Serial No. 58,906.

To all whom if 'muy concern.'

Be it known that I, CHARLES C. STUTZ, residing at Pittsburgh, in thecounty of Allegheny and State of Pennsylvania, a citizen of the FnitedStates, have invented or discovered certain new and useful Improvementsin Furnacesfor Treating Hydrocarbons, of which improvements thefollowing is a specification.

In the practice of the Rittman process for treating hydrocarbons, asdescribed in Bulletin No. 114 of the Bureau of Mines, itl is desirableto maintain a high temperature at the upper end of the tube where theoil is injected so as to effect a practically instantaneous vaporizationof the material treated, a higher or decomposing temperature in thecracking zone, immediately bevlow the portion where vaporization occurs,and a lower temperature below the cracking zone. The object of theinvention described herein is to provide for the regulation of the heatapplied to the tube, so as to insure the proper heating of the differentportions of the tubein accordance with the reactions desired in thedifferent zones. The invention is hereinafter more fully described andclaimed.

In the accompanying drawings forming a part of this specification,Figure 1 is a vertical section of my improved furnace, the plane ofsection being indicated by the line I-I, F ig.v2; Fig. 2 is a sectionalplan View, the plane of section being line II-II Fig. Vl; Figs. 3 and 4are sectional elevations of the lower portions of the furnace, theplanes of section being indicated by the lines III-III, IV--IV,respectively, in Figfl; and Fig. 5y is a sectional elevation on a planeindicated by the line V-V, Fig. 1. Flg. 6 is a sectional plan view, theplane of section being indicated by the line VI-VL Fig. 1. i

As clearly shown in Figs. 1, 2 and 5, the tubes 1 into which thematerial is fed through the pipe 2, are arranged in a portion of thefurnace intermediate the combustion chambers 3 and 4, the former whichis designed to heat the upper portion of the tubes being preferably madethe larger in order to insure the required higher heating of such upperportions. As shown in Figs. 1 and 2, it is preferred to divide the lowerportion of the larger chamber 3 into a series Specification of LettersPatent.

indicated by the Patented 0V. 23, 1920. Renewed March'15, A1919. SerialyNo. 282,968.

of compartments by intersecting walls 5, so that theremay be an evenflow of the products of combustion up through the checkerwork, which ispreferably arranged in the upper portion of the chamber. From thechamber 3, the products of combustion flow through the passage 6 aroundthe upper portions of the tubes 1 and down through the chamber Tthroughwhich the tubes 1 pass. From these tube-containing chambers, theproducts of combustion escape through the ports 8 into the passage 9,the lower end of which connects with a passage 10 leading to the stack11. It is preferred to arrange a deflecting hood 12 over the portion ofthe combustion chamber farthest from the tube containing chambers asshown in Fig. 1.

By reference to Figs. 1 and 5, the lower.

portions of the tubes 1 are inclosed in chambers 13, separated from thechambers 7 by horizontal walls or partitions 14, located below theoutlet ports 8 of the chambers 7. The chambers 13 have inlet ports 15connecting with side passages 16, which in turn connect with oppositesides of the combustion chamber 4 as shown in Figs. 1, 4 and 5. As shownin Fig. 1, an auxiliary roof or top 1,7 closes the combustion chamber 4which is also separated from the other portions of the furnace by avertical wall 18. The lower ends of the chambers 13 connect with flues19 leading to a stack 20.

It will be observed that the combustion chamber 3 is made much largerthan chamber 4, as the former is required to supply sufficient heattoraise the upper portions of the tubes 1 to a cracking or decomposingtemperature, while the latter serve merely as an auxiliary to preventthelower lportions of the tubes becoming cooler than is desirable.

I claim herein as my invention:

1. In a furnace for treating hydrocarbons, the combination of aplurality ofvertically arranged tubes, independent chambers inelosingthe upper and lower portions'of Said tubes, a combustion chamberconnected-to the chambers inclosing theupper portions of the tubes and acombustion chamber isolated from the other combustion chamber, andconnected to the chambers inclosing the lower portions of the tubes.

2. In a furnace for treatinghydrocarbons,

the mmhination of a plurality of vertically arranged tubes, a chamberinclosing portions of the tubes adjacent to the upper ends, a combustionchamber connected to the upper ends of said chambers, flues leading to astack connected to the lower ends of said chambers, chambers inclosingportions of the tubes adjacent to the lower ends, a combustion chamberconnected to the upper portions of these lower heating chambers and 10ter and to a stack.

In testimony whereof, I have hereunto set my hand.

CHARLES C. STUTZ. Witnesses ALICE A. TRILL, THOMAS B. JOYCE.

